FFmpeg
rawenc.c
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1 /*
2  * Raw Video Encoder
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Raw Video Encoder
25  */
26 
27 #include "avcodec.h"
28 #include "codec_internal.h"
29 #include "encode.h"
30 #include "raw.h"
31 #include "internal.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/internal.h"
36 
38 {
40 
42  if(!avctx->codec_tag)
44  avctx->bit_rate = ff_guess_coded_bitrate(avctx);
45 
46  return 0;
47 }
48 
49 static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
50  const AVFrame *frame, int *got_packet)
51 {
53  frame->width, frame->height, 1);
54 
55  if (ret < 0)
56  return ret;
57 
58  if ((ret = ff_get_encode_buffer(avctx, pkt, ret, 0)) < 0)
59  return ret;
61  (const uint8_t **)frame->data, frame->linesize,
62  frame->format,
63  frame->width, frame->height, 1)) < 0)
64  return ret;
65 
66  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
68  int x;
69  for(x = 1; x < frame->height*frame->width*2; x += 2)
70  pkt->data[x] ^= 0x80;
71  } else if (avctx->codec_tag == AV_RL32("b64a") && ret > 0 &&
73  uint64_t v;
74  int x;
75  for (x = 0; x < frame->height * frame->width; x++) {
76  v = AV_RB64(&pkt->data[8 * x]);
77  AV_WB64(&pkt->data[8 * x], v << 48 | v >> 16);
78  }
79  }
80  *got_packet = 1;
81  return 0;
82 }
83 
85  .p.name = "rawvideo",
86  CODEC_LONG_NAME("raw video"),
87  .p.type = AVMEDIA_TYPE_VIDEO,
88  .p.id = AV_CODEC_ID_RAWVIDEO,
89  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
91  .init = raw_encode_init,
93 };
ff_guess_coded_bitrate
int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
Get an estimated video bitrate based on frame size, frame rate and coded bits per pixel.
Definition: utils.c:1083
ff_rawvideo_encoder
const FFCodec ff_rawvideo_encoder
Definition: rawenc.c:84
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2968
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:65
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
pixdesc.h
AV_PIX_FMT_RGBA64BE
@ AV_PIX_FMT_RGBA64BE
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:202
AVFrame::width
int width
Definition: frame.h:412
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:522
encode.h
FFCodec
Definition: codec_internal.h:127
av_get_bits_per_pixel
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2920
raw_encode_init
static av_cold int raw_encode_init(AVCodecContext *avctx)
Definition: rawenc.c:37
AV_WB64
#define AV_WB64(p, v)
Definition: intreadwrite.h:431
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
avcodec_pix_fmt_to_codec_tag
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt)
Return a value representing the fourCC code associated to the pixel format pix_fmt,...
Definition: raw.c:308
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
raw_encode
static int raw_encode(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: rawenc.c:49
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:315
raw.h
pkt
AVPacket * pkt
Definition: movenc.c:59
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
This encoder can reorder user opaque values from input AVFrames and return them with corresponding ou...
Definition: codec.h:159
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
frame
static AVFrame * frame
Definition: demux_decode.c:54
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:110
AV_PIX_FMT_YUYV422
@ AV_PIX_FMT_YUYV422
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:74
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:491
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:523
codec_internal.h
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
av_image_get_buffer_size
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters.
Definition: imgutils.c:466
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1510
internal.h
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:658
avcodec.h
ret
ret
Definition: filter_design.txt:187
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AVCodecContext
main external API structure.
Definition: avcodec.h:441
AVFrame::height
int height
Definition: frame.h:412
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:105
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:466
av_image_copy_to_buffer
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
Definition: imgutils.c:501
AVPacket
This structure stores compressed data.
Definition: packet.h:499
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:385
AV_RB64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:95